Lease Disclosures Schedule of income from direct financing leases (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Interest income	$ 0.8	$ 1.3	$ 1.8	$ 2.7
Variable lease income	(0.0)	0.3	0.2	0.7
Total operating lease income	$ 0.8	$ 1.6	$ 2.0	$ 3.4